Remove the ext4 discard mount option.

Now that fstrim is being used, the discard mount option
is no longer needed.

Change-Id: I043ab587aaa91d89e6d736138d049fc85d13e623
Update unified fstab.mako to support recovery

Add entries to the unified fstab needed by recovery.
Also, copy the unified fstab to /etc/recovery.fstab in the recovery
ramdisk.

Change-Id: Ic9850053409745eb63fda59c0f36b762eb909c20
fstab changes for 4.3 no more vold.fstab

per http://source.android.com/devices/tech/storage/index.html
Change-Id: Ife751e16f471e7961595a6e2ac2fdcdb02f0c4f2
Remove HAVE_SELINUX guards

Change-Id: I136a1a4911e8c7d313a94dea8a78a132788135f9
overlay: Remove obsolete config_wifi_p2p_support

Change-Id: Id65ff3881dfd48474b983790d62d10a34f8421dc